 /*******************************************************************************
  * Copyright (c) 2004, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.internal.presentations;

 import org.eclipse.jface.action.Action;
 import org.eclipse.ui.presentations.IStackPresentationSite;

 /**
  *
  *
  * @since 3.0
  */
 public class SystemMenuStateChange extends Action implements
         ISelfUpdatingAction {
     private IStackPresentationSite site;

     private int state;

     public SystemMenuStateChange(IStackPresentationSite site, String name,
             int state) {
         this.site = site;
         this.state = state;

         setText(name);
         update();
     }

     public void dispose() {
         this.site = null;
     }

     public void run() {
         site.setState(state);
     }

     public void update() {
         setEnabled(site.getState() != state && site.supportsState(state));
     }

     public boolean shouldBeVisible() {
         return site.supportsState(state);
     }

 }

